Elucidation of Reaction Mechanism and Evaluation of Rate of Iron Oxide Reduction with Gas Mixtures including Methane

反应机理的阐明和含甲烷的气体混合物氧化铁还原率的评价

• 批准号: 07650873
• 负责人: USUI Tateo
• 金额: $ 1.41万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650873/
• 关键词: iron making; iron oxide; pellet; reduction reaction; hydrocarbon; thermal decomposition; gas analysis; kinetic analysis

Iron oxide pellets were used as iron ore samples because of the well-known reduction kinetics. The pellets weighing 2kg were packed in a reactor and reduced isothermally with gas mixtures such as CH_4-N_2, CH_4-H_2O-N_2, and CH_4-CO_2-N_2. Elucidation of the reaction mechanism and evaluation of the reduction rate were carried out on the basis of the kinetic analysis using reaction models. Unreacted core shrinking model for three interfaces were adopted to the experimental reduction data of single particles with H_2-H_2O-N_2 or CO-CO_2-N_2 gas mixture, and rate parameters for H_2 or CO reduction were evaluated. Thermal decomposition of methane with iron catalyst was experimentally carried out. Optimum conditions for iron oxide reduction with CH_4 bearing gas mixtures were examined and fundamental data for analyzing pre-reduction of iron oxide with coal carbonization gas were obtained ; carbonizing conditions of coal and reduction conditions of iron oxide were simultaneously investigated to present the optimum ones.

由于众所周知的还原动力学，氧化铁球团被用作铁矿石样品。将重达2kg的球团装入反应器中，与CH_4-N_2、CH_4-H_2O-N_2和CH_4-CO_2-N_2等混合气体等温还原。在动力学分析的基础上，利用反应模型对反应机理进行了阐述，并对还原速率进行了评价。采用三种界面的未反应核收缩模型对H_2- h_2o - n_2或CO- co_2 - n_2混合气体中单颗粒的还原实验数据进行了分析，并对H_2或CO的还原速率参数进行了评价。用铁催化剂对甲烷进行了热分解实验。考察了含CH_4混合气体还原氧化铁的最佳条件，获得了分析煤炭化气体预还原氧化铁的基础数据；同时考察了煤的炭化条件和氧化铁的还原条件，提出了最佳的炭化条件。

项目成果

Tateo Usui, et al.: "Factors Influencing the Reduction of Iron Oxide with Coal Carbonization Gas and Estimation of Coal Consumption Rate for a Total Process Composed of a Pre-reduction Furnace and an In-bath Smelter" The 54th Committee, the Japan Society

臼井立夫等：“影响煤干馏气还原氧化铁的因素以及由预还原炉和浴式熔炼炉组成的全流程的煤炭消耗率的估算” 日本学会第 54 届委员会